HCFC1 and posterior cortical atrophy: Moreover, MTT and CCK‐8 assays showed that the proliferation and viability of PCa cells were markedly decreased by the treatment of CFF‐1 in a concentration‐dependent manner, whereas the proliferation and viability of WPMY‐1 cells were almost not affected by the treatment of CFF‐1 (Fig. 1B and C).